Oh, sure. I'm by no means suggesting a Hayden Christensen Anakin... who was a sociopath when we first meet him in AOTC.
I see people who want Anakin to be Vader-esque in the PT, and that just doesn't work out if he's to go back to being Anakin at the end of ROTJ. There'd be nothing to redeem.
Like with the PT we have now. There's nothing to redeem about him, and there's no real character development. Anakin doesn't fall, he just goes sidewise the whole time.